Pipe-bending machine.



G. K. LASSITER.

` PIPE BENDING MACHINE.

l APPLIGATIONHLBD sEPT,o,1912

dm Q17 WITNESSES C. K. LASSITER;

PIPE BENDI'NG MACHINE.

APPLIOATION EILBD SEPT. 9, 1912. 1,652,069a Patented Feb. 4, 1913.

2 SHEETS-SHEET 2.

l I Mil.

- F l G. 7

if "if WITNES To aZZ 'wao/rfi i may concern.

Be it known that i, Coupons Silvan, ot' Richmond, in 'the of Hen- `fico and ate oli' Vina" na invented 'lie line i position occupied after a pipe has been bent;

. .3, a ti'ansv-e e section, 'through the pise clamping' Cylinder; 6, a side .istatinn' te application modifor anioinatieallj,v stoppingn and lie forming dies; and, Fig. i", a 'oiiyontal section illnstintinp,` the pinmiee olf my invention, a subi 'traine o table, l, is povided foi the sufpoit ot tbe operative meeliani. and

\ .oa-l lnlnilai f lening die 2. is

joniniied in an uppe-L bearing, la, and a lower bearing', l, in the frame. i clamping stein, passes freely through the bore ot the die slia'ti, Q, and is secured at Vits lower d, on, da, provided with "erabljf in the foiin of eylinhan@ i ie, 5, is Seened e, snsiliiended np lc. in upper formino lie nppef end of tle stem, and a lower for' line; die, is Seenied upon adjoiningend of the tabular sliat't, Q, in position to abut. against tile upper die, 5. As moet cleanly shown in Figs. 2 and e, a peripheral groove, 5b, is foirned in each of the toi-innig* dies, 'the eooves being quartei' circle transverse section, so as to pre sent a groove of seinieircnlar -tiansvei'se section when the dies are bfc-iight into contact, and extending cironlally ai'onndtlie najo' portion of the peiiphelies of the dies. The :Cenioining portion of each of the g'ooves is substantially tangential to its eirenlai poition, and extends, in semi-circular section, into tlie metal ot' the die, foaming an stop, 5c, wliieli engages, and holds straight, the lengt-li of pipe, m, on which the niacliine operates, at and adjoining one of its ends.

will be ob *lons to tliose skilled in the a't, that the 'adii of the grooves, 5b, in t-zansverse section, must be in substantial correspondence with the half diameters of tlie pipes to be bent, and the adii of peripheral curvature of the ,giooves in come spondenee with the curvature to which the pipes desired to be bent.4 Separate iemovable and inset/tibio pairs ot foi-ming must therefore be p'iovided to suit Coi*- i'espondin A y diilleient dian'ieteis of pipes and di... .ent desired curi/'atn'ies to be produced tl'ieiein.

The nppei forming die, is moved upwardly, away 'from the lower oniinf?, die, 5a, to admit of the insertion'a'nd removal of the lengths ot' pipe to be bent, in the grooves, 5b, ot' the rlies, and nim/ed downwardly, to and againstl the lower die, to liold the pipe in the grooves and end stop, 5, by the admission ot' fluid under pressne, as steain oi' Compressed air, to the lower o1' to the 'appel' side, as the case may' be, of

the piston, fr, of die clamping cylinder, 4t;

The admission and exhaust ol motivo' fluid to and 'ti-oni tlie uppei' and lower ends of the cylinder, el, is effected tlnoug'li pipes, 6, 3, connecting` said ends with suitable four Way contollinp; Valve mechanism, 7, to which mot-ive fluid is admitted by a supply pipe, la.

guide cylinder, 8, is secured upon die top of the trame, at substantially a right angle to the axis of the 'foilrning dies, and is fitted with a pi'opei'ly packed piston, 8, the -foil, 8", of wliieli, is connected to a cross neat, Sc, in which two guide rollers, 9, each leaving a peripheral ,groove of Substantially eemi-eii'enlai section, afe jomnaled on vel"- tieal pivots, 92. The axis ot the cylinder, 8, and the middle hoiizontal plane oi? the guide rollers, 9, are in a plane coincident with tlie plane Contact of the adjoining 'faces of the uppe' and lower forming dies, 5, 511. The z'olleifs, 9, therefore, present our-ved bearings for one side of the length of pipe, m, desired to be bent, which are in the same horizontal plane as the bearing of the gfooves ol the forming dies on the opsaid dies is secured, means forint-ating said shaft, a stem Within said tubular shaft and to which the other of said dies is secured, Huid-operated means to move said stem longitudinally to open and Close said dies, i

a pair of guide-rollers movable laterally t0- Ward and away from said dies, Huid-operated means for moving said guide-rollers, and valve mechanism for controlling said fuid-operated means.

COLUMBUS K. LASSITER. Witnesses 4J. SNOWDEN BELL, A.v S. FOWLER. 

